################################################################################
#
# CMake macro for listing subdirectories of a given directory.
#
# Copyright (c) 2014, B&R Industrial Automation GmbH
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above copyright
#       notice, this list of conditions and the following disclaimer in the
#       documentation and/or other materials provided with the distribution.
#     * Neither the name of the copyright holders nor the
#       names of its contributors may be used to endorse or promote products
#       derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDERS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
################################################################################

MACRO(LIST_SUBDIRECTORIES RETVAL CURDIR DEPTH)
    SET(SEARCH_DIR ${CURDIR})
    FOREACH(INDEX RANGE 1 ${DEPTH})
        SET(SEARCH_DIR "${SEARCH_DIR}/*")
    ENDFOREACH()

    FILE(GLOB SUB_DIR RELATIVE ${CURDIR} ${SEARCH_DIR})
    SET(LIST_OF_DIRS "")
    FOREACH(DIR ${SUB_DIR})
    IF(IS_DIRECTORY ${CURDIR}/${DIR})
        SET(LIST_OF_DIRS ${LIST_OF_DIRS} ${DIR})
    ENDIF()
    ENDFOREACH()
    SET(${RETVAL} ${LIST_OF_DIRS})
ENDMACRO()
